I want to ask everyone in Oakland a question everyday.

But, I’m only interested in answering 5 questions from other people per day assuming the answers would be put to good use.

Given there are about 500k people in the city, if everyone sent a question daily then the system would deliver an unmanageable heap of 499,999 pieces of spam to everyone. Filter out duplicate questions and there might only be 25k questions sent to everyone everyday — still too many.

I could have other people answer my question for me. I’d only need to find people to answer 24,995 of the questions the same way as I would and I could answer my 5 questions on behalf of 24,995 people and this would be solved.